R help - Aug 2013 - Summation sign

Hi all

I have a short question relating to the usage of the summation sign in R.

Let's define A and B as two kxk matrices (which are constant).
C^(n) = Ó_(j=1)^n [(Ó_(i=1)^(j-1) A^i ) B (Ó_(i=1)^(j-1) A^i)’  ]

My goal is to calculate the matrix C for the periods from 1 to 200 (n=1-200).

How has that to be implemented in R?

Thank you for your help!!

Kind regards,
Sebastian

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Hello Sebastian,

I think you may need to use tensorA package. You can define different
indices and use Einstein or Reimann summation convention.

Gr??e,
Mehmet

On 23 August 2013 15:14, Sebastian Hersberger
<sebastian.hersberger at unibas.ch> wrote:
> Hi all
>
> I have a short question relating to the usage of the summation sign in R.
>
> Let's define A and B as two kxk matrices (which are constant).
> C^(n) = ?_(j=1)^n [(?_(i=1)^(j-1) A^i ) B (?_(i=1)^(j-1) A^i)?  ]
>
> My goal is to calculate the matrix C for the periods from 1 to 200
(n=1-200).
>
> How has that to be implemented in R?
>
> Thank you for your help!!
>
> Kind regards,
> Sebastian
>
>         [[alternative HTML version deleted]]
>
>
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